L-theanine
Also known as: theanine
Classification
Unknown
Regulatory Status
Overview
L-theanine is an amino acid from tea discussed for relaxation. A mechanism and effect size are not established here.
Evidence and limitations
Human/preclinical evidence breakdown is not available in this record.
ClassB source cannot establish canonical regulatory or safety fields. The statements below are retained as uncertainty, not as a label-backed verdict. | Regulatory status: not-established | Warning: A specific adverse-effect profile is not established | Precaution: Risk profile is not a personal clearance | Adverse effect: headache and gastrointestinal upset are discussed and not quantified | Serious adverse effect: a serious-event rate is not established
Pathways
Benefits
A PubMed systematic review and meta-analysis examined cognitive and affective effects of L-theanine across randomized trials.
Interactions & cautions
Flagged in source data
These are observational flags for review, not individualized instructions.
Sources
Educational reference only — not medical advice.